TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4025 SUBJECT: INT 2.5m limit for GRB050922B DATE: 05/09/23 11:06:37 GMT FROM: Martin Jelinek at Inst.Astrophys.Andalucia,Granada S. Guziy, M. Jelinek, J. Gorosabel, A.J. Castro-Tirado, A. de Ugarte Postigo (IAA-CSIC Granada, Spain), Ernesto Rodriguez Flores (IGA, La Habana, Cuba) and K. Vijanen (IAC-CSIC La Laguna, Spain) report: "We have acquired r' image of the GRB 050922B XRT error box (Norris et al. GCN 4008) with INT 2.5m telescope at Observatorio del Roque de los Muchachos on La Palma starting on September 23.1943 UT (i.e. 0.5678d after the GRB) with 600s exposure. No sources brighter than r'=22.5 (3-sigma) are detected within the 8" radius of the XRT error circle" This message can be cited.